I am not sure where you got the impression that a 20 gauge is weak. You now have saboted ammo that shoots mid 200 grain bullets out of the barrel of a 20 gauge at 1900-2000 fps. That is not "weak" at all. I shoot the 12 gauge, but would now, due to the advancements in ammunition, choose to shoot the 20 gauge instead if I purchased a new rifle. Like I have recommended on many previous threads, I have had fantastic luck with the Winchester Platinum tip sabot rounds.